 | Obduction | Cyan Inc | 7/10 |  |
 | Oceanhorn: Monster of Uncharted Seas | Cornfox & Bros. | 5/10 |  |
 | Octahedron | Square Enix | 8/10 |  |
 | Oddworld: Abe's Oddysee - New 'n' Tasty! | Oddworld Inhabitants | 8/10 |  |
 | Odin Sphere Leifthrasir | NIS America | 9/10 |  |
 | Oh My Godheads | Square Enix | 5/10 |  |
 | Oh...Sir!! The Insult Simulator | Vile Monarch | 7/10 |  |
 | Okami HD | Capcom | 8/10 |  |
 | Old Time Hockey | V7 Entertainment | 7/10 |  |
 | Omensight | Spearhead Games | 7/10 |  |
 | One Night Stand | Ratalaika Games | 8/10 |  |
 | One Piece: Burning Blood | Bandai Namco | 6/10 |  |
 | One Piece: Pirate Warriors 3 | Bandai Namco | 8/10 |  |
 | One Piece: Pirate Warriors 4 | Bandai Namco | 7/10 |  |
 | One Piece: Unlimited World Red Deluxe Edition | Bandai Namco | 7/10 |  |
 | One Punch Man: A Hero Nobody Knows | Bandai Namco | 5/10 |  |
 | One Upon Light | Rising Star Games | 7/10 |  |
 | Onechanbara Z2: Chaos | NIS America | 6/10 |  |
 | Onee Chanbara ORIGIN | D3 Publisher | 5/10 |  |
 | Onrush | Koch Media | 8/10 |  |
 | Othercide | Focus Home Interactive | 6/10 |  |
 | Out of Ammo | Zen Studios | 2/10 |  |
 | Outbreak: The New Nightmare | Dead Drop Studios LLC | 2/10 |  |
 | Outlast 2 | Red Barrels | 5/10 |  |
 | Overcooked | Team17 | 8/10 |  |
 | Overcooked: The Lost Morsel | Team17 | 7/10 |  |
 | Overpass | Nacon | 5/10 |  |